This file was deleted in https://trac.webkit.org/changeset/272923/webkit, but a reference to it was left behind in WebKit.xcodeproj/project.pbxproj.
<rdar://problem/74808525>
Created attachment 421708 [details] Patch
Comment on attachment 421708 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=421708&action=review > Source/WebKit/WebKit.xcodeproj/project.pbxproj:-3876 > - 49917DA6252D649E0050313F /* WKMediaPlaybackState.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = WKMediaPlaybackState.h; sourceTree = "<group>"; }; Oops! ;-)
Committed r273593: <https://commits.webkit.org/r273593> All reviewed patches have been landed. Closing bug and clearing flags on attachment 421708 [details].